Brief Report
Oct 1982
Equivalent Roughness of Alluvial Bed
Publication: Journal of the Hydraulics Division
Volume 108, Issue 10
Abstract
The eguivalent roughness of a movable bed is considered. Relationships are given which can be used to determine the equivalent bed roughness from the bed material size and the bed-form dimensions. In the case of a plane bed the equivalent roughness is related to the D90 of the bed material. Based on flume and field data, the equivalent roughness may vary from 1-10 D90. Similar values were reported by other research-workers. In the case of bed forms the equivalent roughness is related to the average height and length of the bed forms. Both flume and field data were used to determine a functional relationship. The proposed relationship yields values which are considerably smaller than other existing relationships.
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Published In
Journal of the Hydraulics Division
Volume 108 • Issue 10 • October 1982
Pages: 1215 - 1218
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Oct 1982
Published online: Feb 3, 2021
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Authors
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Leo C. van Rijn
Project Engr., Delft Hydr. Lab., Delft, The Netherlands
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.